<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="myjQuery.js"></script>
</head>
<body>
<li>asasds</li>
<li>bbbs</li>
<li>ccccs</li>
<script>
    $('li').each(function(i){
        console.log(i);
        console.log(this);
    })
    $.each(['aa','bb','cc'],function(i,v){
        console.log(i)
        console.log(v)
    })
</script>
</body>
</html>